As AI model training continues to scale, GPU computing power, server interconnect bandwidth, and data center network speeds are increasing rapidly. From 800G to 1.6T optical communication, AI infrastructure is placing higher requirements on clock frequency, phase jitter, stability, and signal integrity.
In these high-speed systems, differential crystal oscillators provide stable reference clocks for AI accelerator cards, high-speed network interface cards (NICs), optical modules, switch chips, and other critical devices.
With differential outputs such as LVDS, LVPECL, and HCSL, these oscillators are increasingly important for reliable timing in AI servers and high-speed interconnect systems.
An AI server typically integrates GPUs or AI accelerators, PCIe interfaces, high-speed NICs, optical modules, switch chips, BMCs, and other high-speed devices.
Stable reference clocks are required to synchronize data transmission between these chips and interfaces.
Compared with conventional single-ended oscillators, differential oscillators provide better noise immunity and signal integrity in high-speed signal environments. Outputs such as LVDS, LVPECL, and HCSL are widely used in high-speed digital and communication systems where clock quality directly affects link performance.
It is important to note that there is no single clock frequency used by all AI servers. The required frequency depends on the specific GPU, DSP, PHY, SerDes, interface standard, and overall clock architecture.
As SerDes data rates, optical communication speeds, and AI accelerator performance continue to increase, reference clock requirements are also becoming more demanding.
A suitable differential oscillator should support the required frequency range while matching the clock specifications of the target PHY, SerDes, switch, or accelerator device.
Phase jitter is one of the most important performance parameters for high-speed clock sources.
Lower jitter means more stable clock edges and less timing uncertainty, which helps maintain accurate sampling and reliable high-speed data transmission.
For this reason, AI servers, optical communication systems, and high-speed networking equipment often require differential oscillators with low phase noise and ultra-low phase jitter.
AI servers and data centers are designed for continuous operation over long periods.
The clock source therefore needs good frequency stability and temperature stability to maintain consistent timing performance under changing operating conditions.
Different chips and interfaces may require different clock signal standards.
Differential oscillators for AI server applications commonly support:
LVDS
LVPECL
HCSL
Other high-speed differential output formats
Supply voltages such as 1.8 V, 2.5 V, and 3.3 V may also be required depending on the system design.
YXC provides multiple differential crystal oscillator solutions for AI servers, AI accelerator cards, high-speed networking, optical communication, and data center applications.
The YSO212PU is designed for high-frequency and ultra-low-jitter clock applications.
Key specifications:
Frequency range: 200 kHz to 1.5 GHz
Package sizes: 2.0 × 1.6 mm, 2.5 × 2.0 mm, 3.2 × 2.5 mm
Outputs: LVPECL, LVDS, HCSL, LPHCSL, LVDS-Boost (800 mV typ.), CML
Typical phase jitter: 0.069 ps
Its wide frequency range and multiple differential output options make it suitable for a variety of high-speed clock architectures.
The YSO233UJ is designed for applications that require very low clock jitter.
Key specifications:
Available frequencies: 100 MHz, 125 MHz, 155.52 MHz, 156.25 MHz, 312.5 MHz
Package sizes: 2.5 × 2.0 mm, 3.2 × 2.5 mm
Outputs: LVDS, LVPECL, HCSL
Typical phase jitter: 0.03 ps
Operating temperature: -40°C to +85°C
It can be used in high-speed networking and communication equipment where low timing uncertainty is required.
The YSO230LR provides a flexible combination of frequency, package, voltage, and differential output options.
Key specifications:
Frequency range: 13.5 MHz to 200 MHz
Package sizes: 2.5 × 2.0 mm, 3.2 × 2.5 mm, 5.0 × 3.2 mm, 7.0 × 5.0 mm
Outputs: LVDS, LVPECL, HCSL
Supply voltage: 1.8 V / 2.5 V / 3.3 V
Typical phase jitter: 0.1 ps
Multiple compact package options allow designers to select the appropriate device according to PCB space and system requirements.
Phase jitter values are typical. Refer to the corresponding product datasheet for detailed measurement conditions and specifications.
YXC has developed a range of differential oscillator solutions, including the YSO212PU, YSO233UJ, and YSO230LR, to address different requirements for AI servers, high-speed communication systems, optical networks, and data center equipment.
The main difference is the output signal format.
A differential oscillator provides a pair of complementary signals using standards such as LVDS, LVPECL, or HCSL. Compared with a conventional single-ended clock, differential signaling generally offers better noise immunity and signal integrity, making it well suited to high-speed interconnect applications.
Frequency alone is not enough when selecting a clock oscillator for an AI server.
Engineers should consider:
Frequency and frequency range
Phase jitter and phase noise
Differential output format
Supply voltage
Operating temperature
Frequency stability
Package size
Device consistency
For AI accelerator cards, high-speed NICs, optical modules, and other high-speed interfaces, the oscillator should be selected according to the specific chip requirements and system clock architecture.
As AI computing and high-speed interconnect technologies continue to evolve, clock quality will remain a critical part of reliable system design. YXC provides low-jitter differential oscillator solutions for different frequencies, interfaces, and high-speed timing requirements.
